How da hek do you do terraria pixel art I can only do regular art

OC) some of my terraria pixel arts : r/Terraria

Misc. on Terraria-Pixel-Art - DeviantArt

Terraria 1.3 Let's Build Ep9 Pixel Art! Terraria house design tutorial

Simple eoc pixel-art : r/Terraria

Pixel Art - Tips and Tricks ( Not Pro ) ( Terraria ) 1/2

Pixel Art 101: Terraria Samurai

Pixel Art - [TUTORIAL] Coloring and Shading

Click this image to show the full-size version. Terraria house design, Terraria house ideas, Pixel art

Pixel Art - [TUTORIAL] Coloring and Shading